linux-kernel - Re: [sched] 73628fba4: +69% context switches

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Message-ID: <20140116030142.GA19524@localhost>
Date:	Thu, 16 Jan 2014 11:01:42 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Alex Shi <alex.shi@...aro.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>, lkp@...ux.intel.com
Subject: Re: [sched] 73628fba4: +69% context switches

On Thu, Jan 16, 2014 at 10:46:01AM +0800, Alex Shi wrote:
> >>>> > >>
> >>>> > >> What's about the aim7 shell_rtns_1 and shared throughput?
> >>> > > 
> >>> > > The throughputs remain the same.  We only report changed numbers.
> >> > 
> >> > So many interrupt increase doesn't cause any performance change, that
> >> > make more doubt of data correction.
> >> > Could you like to give the typical vmstat output? Specially the
> >> > sys/us/wa/id time percentages.
> 
> > wfg@bee /lkp/result/lkp-ne04/micro/aim7/shell_rtns_1/x86_64-lkp/91dd08bd65052b483f96f75abcc93f2f1b67a62c/1% cat vmstat
> > 1389799131.230965 procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
> > 1389799131.231067  r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa
> > 1389799143.207206 1912 26      0 10354424      0 851960    0    0     0     0 8849 31376 28 67  6  0
> > 1389799144.207531 1515 35      0 10318484      0 852092    0    0     0     0 7670 28332 31 69  0  0
> > 1389799145.207852 1678 26      0 10303276      0 852196    0    0     0     0 7596 27208 31 69  0  0
> > 1389799146.208176 1981 43      0 10264672      0 852284    0    0     0     0 7478 27313 31 69  0  0
> > 1389799147.208500 1977 35      0 10299316      0 852380    0    0     0     0 8505 29552 30 70  0  0
> 
> That's for the data!

It does not matter in comparison POV. How do you know when aim starts
the testing phase?

> Is it the per seconds or per 10 seconds?

It's per seconds. The first column has the time stamps.

Thanks,
Fengguang
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